FARMINGTON — Nathanael Sloop, charged in the 2010 death of his 4-year-old stepson Ethan Stacy, is facing new charges after allegedly assaulting a sheriff’s deputy on Nov. 21.

Two second-degree aggravated assault charges and a class B misdemeanor charge of terroristic threat were filed in 2nd District Court late Wednesday afternoon against Sloop after authorities say he attacked a deputy, biting, gouging and striking the deputy after refusing an order to return to his cell.

The charges are in addition to the aggravated murder, felony child abuse, obstruction of justice and felony abuse or desecration of a body charges he already faced in connection with the child’s death.

According to a probable cause statement filed Wednesday, Deputy Kenny McQuivey was called to the Echo housing unit to assist Deputy Kirk Silver with Sloop. When McQuivey arrived, he said he saw Sloop “punch Deputy Kirk Silver in the face.” McQuivey also said that he saw Sloop scratch Silver’s face with his fingernails and attempt to gouge out Silver’s left eye with his thumb.

“Inmate Sloop was able to get Deputy Silver’s head in a choke hold underneath (Sloop’s) right arm,” McQuivey said in the probable cause statement. They both fell backwards into a cell. As the two continued to fight, McQuivey was able to restrain Sloop’s leg as he was trying to kick Silver, the statement continued.

When Silver tried to move away from Sloop, he allegedly “lunged” and bit Silver’s left thumb, according to the court document. Silver had to see a doctor at the jail for the injury.

The court affidavit said Sloop yelled several expletives while threatening Silver.

After Sloop was restrained and placed in another unit, he asked for a toothbrush, “because I still have pieces of his skin in my mouth,” he allegedly said.

No court date has been set on the assault charges, but Sloop’s trial on the murder charge is set for March.